Contents Wiring diagrams Section: Retractable Hardtop System - Diagnosis: Diagnosis All sections

PROBLEM SYMPTOMS TABLE Lexus SC II

PROBLEM SYMPTOMS TABLE

SymptomSuspect AreaSee
Roof cannot be opened or closed (Roof lock is not released).Roof lock motor circuit Roof lock assembly«DTC B2511 OPEN IN ROOF LOCK MOTOR CIRCUIT» OVERHAUL
Roof cannot be opened or closed (Roof lock is released).Roof drive motor circuit Roof link assembly«DTC B2502 OPEN IN ROOF DRIVE MOTOR RH CIRCUIT» «DTC B2504 OPEN IN ROOF DRIVE MOTOR LH CIRCUIT» OVERHAUL
Roof cannot be opened (Front door window cannot be lowered).Power window motor circuit Power window regulator assembly Door ECU«POWER WINDOW CONTROL SYSTEM» «PRE-CHECK» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»
Roof will stop halfwayRoof motor circuit Roof link assembly Package tray motor circuit Package tray assembly A/C ECU Ambient temp, sensor Driver door ECU Driver side power window Passenger door ECU Passenger side power window ECM«DTC B2502 OPEN IN ROOF DRIVE MOTOR RH CIRCUIT» «DTC B2504 OPEN IN ROOF DRIVE MOTOR LH CIRCUIT» OVERHAUL COMPRESSOR CIRCUIT OVERHAUL PROBLEM SYMPTOMS TABLE DTC B1412/12 AMBIENT TEMPERATURE SENSOR CIRCUIT «ELECTRONIC CIRCUIT INSPECTION PROCEDURE» «TERMINALS OF ECU» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE» «TERMINALS OF ECU» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»
Luggage door cannot be opened (Luggage front lock is not released).Luggage front unlock motor circuit Luggage front unlock assembly Roof control switch Combination meter ECU Luggage room J/B ECU Driver side J/B ECU Tonneau cover switchCOMPRESSOR CIRCUIT REPLACEMENT «DTC B2537 ROOF CONTROL SWITCH MALFUNCTION» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE» «DTC B2535 TONNEAU COVER SWITCH MALFUNCTION»
Luggage door cannot be opened or closed (Luggage front lock is released).Luggage motor circuit Luggage link assembly«DTC B2506 OPEN IN LUGGAGE DOOR DRIVE MOTOR RH CIRCUIT» «DTC B2508 OPEN IN LUGGAGE DOOR DRIVE MOTOR LH CIRCUIT» REPLACEMENT
Luggage door cannot be closed (Luggage front lock dose not function).Luggage front lock motor circuit Luggage front lock assembly Roof control switch Combination meter ECU Luggage room J/B ECU Driver side J/B ECU«DTC B2513 OPEN IN LUGGAGE CLOSER MOTOR RH CIRCUIT» «DTC B2515 OPEN IN LUGGAGE CLOSER MOTOR LH CIRCUIT» REPLACEMENT «DTC B2537 ROOF CONTROL SWITCH MALFUNCTION» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE» «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»
Package tray dose not function (No movement).Package tray motor circuit Package tray assembly«DTC B2518 OPEN IN PACKAGE TRAY MOTOR CIRCUIT» OVERHAUL
Quarter window will stop halfway.Quarter window regulator Quarter window motor assemblyCOMPRESSOR CIRCUIT «DTC B2516 OPEN IN QUARTER WINDOW MOTOR RH CIRCUIT» «DTC B2517 OPEN IN QUARTER WINDOW MOTOR LH CIRCUIT»
Indicator display will not change.Roof control switch«DTC B2537 ROOF CONTROL SWITCH MALFUNCTION»
Warning buzzer will not sound.Combination meter ECUWARNING BUZZER DOES NOT SOUND (OPEN DOOR WARN
Will not operate unless shifting in P or N positionSkid control ECU Speed sensor«ELECTRONIC CIRCUIT INSPECTION PROCEDURE» PROBLEM SYMPTOMS TABLE

PROBLEM SYMPTOMS